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Reports code that uses <b>==</b> or <b>!=</b> instead of <code>equals()</code> to test for <code>Number</code> equality.
<p>
  With auto-boxing, it is easy
  to make the mistake of comparing two instances of a wrapper type instead of two primitives, for example <code>Integer</code> instead of
  <code>int</code>.
</p>
<p><b>Example:</b></p>
<pre><code>  void foo(Integer a, Integer b) {
    final boolean bool = a == b;
  }
</code></pre>
<p>If <code>a</code> is known to be non-null, then it's safe to apply the "unsafe" quick-fix and get the result similar to the following:</p>
<pre><code>  void foo(Integer a, Integer b) {
    final boolean bool = a.equals(b);
  }
</code></pre>
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